Hot-pressing folding device for household paper
By designing a stable conveying and precise folding hot-pressing folding device, the problem of paper shifting during the conveying process was solved, achieving efficient production and cost reduction.
Patent Information
- Application Number
- CN202422311501.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the current production process of household paper, the paper is prone to shifting during transportation, resulting in poor heat pressing effect.
A device including a conveying mechanism, a folding mechanism, and a hot pressing mechanism was designed. It adopts upper and lower hot pressing components and a width adjustment component. The baffle and limiting structure ensure stable paper conveying and precise folding. The stop mechanism controls the paper conveying, enabling rapid adjustment and adaptation to different specifications.
It improves the stable feeding and precise folding of paper, enhances the neatness and aesthetics of finished products, increases production efficiency and equipment versatility, and reduces production costs.
Smart Images
Figure CN223507835U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of household paper production technology, and in particular relates to a hot pressing and folding device for household paper. Background Technology
[0002] A hot-press folding device for household paper products typically refers to a mechanical component used in the production of toilet paper, facial tissues, and other household paper products to fold and compact the paper through hot pressing. This mechanism ensures that the paper is neat and tightly packed, facilitating use and packaging.
[0003] The main processes of a hot-press folding unit include: Paper feeding: feeding paper from upstream of the production line to the folding unit. Paper folding: folding the paper into the desired shape using a robotic arm or folding plate. Hot pressing: using heating elements to hot-press the folded paper to enhance its density and strength. Cooling and shaping: the hot-pressed paper needs to be cooled to maintain its shape. Conveying to the next process: the folded and pressed paper is conveyed to packaging or other subsequent processes.
[0004] Existing household paper products encounter various problems during the production process, such as the paper shifting during the pressing process, resulting in poor heat pressing effect. Utility Model Content
[0005] The purpose of this invention is to provide a hot pressing and folding device for household paper, which aims to solve the technical problem in the prior art where the paper is easily misaligned during the conveying process, resulting in poor hot pressing effect.
[0006] To achieve the above objectives, this utility model provides a hot-pressing and folding device for household paper, comprising a conveying mechanism, a folding mechanism, and a hot-pressing mechanism; the household paper is conveyed to the folding mechanism via the conveying mechanism, and the folding mechanism folds the household paper in half; the conveying mechanism conveys the folded household paper to the hot-pressing mechanism; the hot-pressing mechanism includes a frame, and an upper hot-pressing component, a lower hot-pressing component, and a width adjustment component, all disposed on the frame; the upper hot-pressing component and the lower hot-pressing component are arranged vertically opposite to each other, and the conveying mechanism is located between the upper hot-pressing component and the lower hot-pressing component; the width adjustment component includes baffles and a limiting structure located on opposite sides of the conveying mechanism, and the distance between the limiting structure and the baffles can be adjusted according to the width of the household paper.
[0007] Optionally, the limiting structure includes a movable plate and an adjusting cylinder. The adjusting cylinder is mounted on the frame, and the movable plate is connected to the movable end of the adjusting cylinder. The movable plate is opposite to and parallel to the baffle. The adjusting cylinder can drive the movable plate to move closer to or away from the limiting plate.
[0008] Optionally, a flexible layer is provided on the opposite side of the movable plate and the baffle, and the flexible layer is connected to the movable plate and the baffle by adhesive bonding.
[0009] Optionally, the upper hot pressing assembly includes an upper drive cylinder and an upper hot pressing module, wherein the upper drive cylinder is mounted on the frame and the upper hot pressing module is mounted on the moving end of the upper drive cylinder.
[0010] Optionally, the lower hot pressing assembly includes a lower drive cylinder and a lower hot pressing module; the lower drive cylinder is disposed on the frame, the lower hot pressing module is disposed on the moving end of the lower drive cylinder, and the lower hot pressing module is disposed opposite to the upper hot pressing module.
[0011] Optionally, the lower pressing module includes a first pressing block and a second pressing block, the first pressing block being disposed on opposite sides of the conveying mechanism, and the second pressing block being disposed on the moving end of the driving cylinder; both the first pressing block and the second pressing block are provided with heating tubes.
[0012] Optionally, the conveying mechanism is a belt conveyor structure, wherein the two belts of the belt conveyor structure are arranged opposite each other and spaced apart.
[0013] Optionally, the folding mechanism includes a folding plate and a robotic arm; the folding plate is located on the conveying stroke of the conveying mechanism and is used to pre-fold the tissue paper; the robotic arm is located beside the folding plate and is used to clamp the folded tissue paper and pull it to the hot pressing mechanism.
[0014] Optionally, it also includes a stop mechanism, which is disposed on the side of the frame away from the folding mechanism and located on the conveying stroke of the conveying mechanism. The stop mechanism is used to block the conveying of tissue paper.
[0015] Optionally, the stopping mechanism includes a stopping cylinder, a mounting base, and a stopping block; the stopping cylinder is disposed on the frame, and the mounting base is mounted on the stopping cylinder or the frame; the stopping block is rotatably connected to the mounting base, and one end of the stopping block is connected to the telescopic end of the stopping cylinder; when the telescopic end of the stopping cylinder extends, one end of the stopping block rotates and extends out of the conveying surface of the conveying mechanism.
[0016] The above-mentioned technical solutions of one or more of the hot-pressing and folding devices for household paper provided in this utility model embodiment have at least one of the following technical effects: its design has several significant beneficial effects. First, the conveying mechanism of the device ensures stable conveying of household paper, reduces paper damage and deformation during the folding process, and improves production efficiency. Second, the addition of the folding mechanism allows the paper to be folded precisely, enhancing the neatness and aesthetics of the finished product. In addition, the relative arrangement of the upper and lower hot-pressing components of the hot-pressing mechanism, combined with the flexibility of the width adjustment component, allows for rapid adjustment according to different widths of household paper, adapting to the needs of various product specifications and improving the versatility and flexibility of the equipment.
[0017] This device is designed with ease of operation in mind. Through the combination of baffles and limiting structures, users can easily adjust the paper width, reducing adjustment time and labor intensity during production. Overall, this innovative device not only improves production efficiency and product quality but also reduces production costs, demonstrating significant economic benefits and promising market application prospects. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the hot-pressing folding device provided in an embodiment of this utility model.
[0020] Figure 2 This is a schematic diagram of the hot pressing mechanism provided in an embodiment of the present invention.
[0021] Figure 3 This is a schematic diagram of the hot pressing mechanism provided in an embodiment of the present utility model from another perspective.
[0022] Figure 4 A cross-sectional view of the hot pressing mechanism provided in an embodiment of this utility model.
[0023] The following are the labeling elements in the figure:
[0024] Conveying mechanism 10, folding mechanism 20, folding plate 21, robotic arm 22, hot pressing mechanism 30, frame 31, upper hot pressing assembly 32, lower hot pressing assembly 33, width adjustment assembly 34, upper drive cylinder 321, upper hot pressing module 322, lower drive cylinder 331, lower hot pressing module 332, baffle 341, limiting structure 342, first lower pressing block 3321, second lower pressing block 3322, moving plate 3421, adjusting cylinder 3422, flexible layer 3423, stop mechanism 40, stop cylinder 41, mounting base 42, stop block 43. Detailed Implementation
[0025] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-4 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.
[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0029] In one embodiment of this utility model, such as Figures 1-4 As shown, a hot-pressing and folding device for household paper is provided, including a conveying mechanism 10, a folding mechanism 20, and a hot-pressing mechanism 30. The household paper is conveyed to the folding mechanism 20 via the conveying mechanism 10, and the folding mechanism 20 folds the household paper in half. The conveying mechanism 10 conveys the folded household paper to the hot-pressing mechanism 30. The hot-pressing mechanism 30 includes a frame 31, and an upper hot-pressing assembly 32, a lower hot-pressing assembly 33, and a width adjustment assembly 34, all of which are disposed on the frame 31. The upper hot-pressing assembly 32 and the lower hot-pressing assembly 33 are arranged vertically opposite to each other, and the conveying mechanism 10 is located between the upper hot-pressing assembly 32 and the lower hot-pressing assembly 33. The width adjustment assembly 34 includes a baffle 341 and a limiting structure 342 located on opposite sides of the conveying mechanism 10, and the distance between the limiting structure 342 and the baffle 341 can be adjusted according to the width of the household paper.
[0030] First, the conveying mechanism 10 of the device ensures stable feeding of tissue paper, reducing paper damage and deformation during folding and improving production efficiency. Second, the addition of the folding mechanism 20 allows for precise folding of the paper, enhancing the neatness and aesthetics of the finished product. Furthermore, the relative arrangement of the upper and lower hot-pressing components 32 and 33 of the hot-pressing mechanism 30, combined with the flexibility of the width adjustment component 34, allows for rapid adjustment according to different widths of tissue paper, adapting to various product specifications and improving the versatility and flexibility of the equipment.
[0031] The design of this device also considers ease of operation. Through the cooperation of the baffle 341 and the limiting structure 342, users can easily adjust the paper width, reducing adjustment time and labor intensity during production. Overall, through its innovative structure, this device not only improves production efficiency and product quality but also reduces production costs, demonstrating significant economic benefits and promising market application prospects.
[0032] In this example, the limiting structure 342 includes a movable plate 3421 and an adjusting cylinder 3422. The adjusting cylinder 3422 is mounted on the frame 31. The movable plate 3421 is connected to the movable end of the adjusting cylinder 3422. The movable plate 3421 is positioned opposite and parallel to the baffle 341. The adjusting cylinder 3422 can drive the movable plate 3421 to move closer to or away from the limiting plate. Specifically, the connection between the movable plate 3421 and the adjusting cylinder 3422 is achieved through a mechanical connection, such as using a pin. This connection allows the movable plate 3421 to move along a predetermined path under the push of the cylinder. The relative position between the movable plate 3421 and the baffle 341 together defines the limiting range of the object (tissue paper). The movable plate 3421 and the baffle 341 are typically designed to be parallel to ensure that the object remains stable when moving between the movable plate 3421 and the baffle 341. The position of the baffle 341 is fixed, while the position of the movable plate 3421 is variable. This allows the adjusting cylinder 3422 to adjust the position of the movable plate 3421 as needed, thereby changing the object's limiting range. When the object's position needs adjustment, the adjusting cylinder 3422 receives a signal (possibly an electrical or pneumatic signal) instructing it to expand or contract. The expansion or contraction of the cylinder is transmitted to the movable plate 3421 via a mechanical connection, causing the movable plate 3421 to move along its path, thus moving closer to or away from the limiting plate. The movement of the movable plate 3421 can be monitored by an encoder or other sensors to ensure precise control and feedback.
[0033] This limiting structure 342 provides a flexible and adjustable way to control the position of an object, suitable for automated systems requiring precise positioning. Because the adjusting cylinder 3422 can respond quickly to control signals, this structure enables rapid position adjustments, improving production efficiency. Precise control of the position of the moving plate 3421 ensures accurate alignment of objects during processing or assembly, thereby improving product quality. This structure also reduces the labor intensity of operators when adjusting object positions, as it can be achieved through automated control.
[0034] In this example, a flexible layer 3423 is provided on the opposite side of the moving plate 3421 and the baffle 341. The flexible layer 3423 is connected to the moving plate 3421 and the baffle 341 by adhesive bonding. Specifically, the flexible layer 3423 is a layer of elastic material that is bonded to the moving plate 3421 and the baffle 341 by adhesive bonding. This bonding typically uses a special adhesive to ensure a strong bond between the flexible layer 3423 and the rigid material. When the adjusting cylinder 3422 drives the moving plate 3421 closer to or further away from the limiting plate, the flexible layer 3423 deforms to adapt to the positional change of the moving plate 3421. The elastic properties of the flexible layer 3423 allow it to provide a dynamic buffering effect between the moving plate 3421 and the baffle 341, reducing the impact and noise that may be caused by direct hard contact. Common materials for the flexible layer 3423 include rubber, silicone, polyurethane, or other synthetic materials.
[0035] In this example, the upper hot-press assembly 32 includes an upper drive cylinder 321 and an upper hot-press module 322. The upper drive cylinder 321 is mounted on the frame 31, and the upper hot-press module 322 is located at the moving end of the upper drive cylinder 321. Specifically, the connection between the upper drive cylinder 321 and the frame 31 is typically achieved through bolts, clamps, or welding to ensure the stability and precise positioning of the cylinder on the frame 31. The upper hot-press module 322 is connected to the moving end of the upper drive cylinder 321, which may be achieved through mechanical structures such as sliders, guide rails, or hinges to ensure smooth movement of the module. After receiving a control signal, the upper drive cylinder 321 generates power through compressed air or hydraulic oil, pushing its moving end upward or downward. When the moving end of the cylinder moves, it drives the upper hot-press module 322 downward, cooperating with the lower hot-press assembly 33 to achieve the hot-pressing operation on tissue paper. The upper hot pressing module 322 includes heating elements, such as heating plates or heating rods, for providing the necessary heat during the hot pressing process.
[0036] In this example, the lower hot-press assembly 33 includes a lower drive cylinder 331 and a lower hot-press module 332. The lower drive cylinder 331 is mounted on the frame 31, and the lower hot-press module 332 is located at the moving end of the lower drive cylinder 331, with the lower hot-press module 332 positioned opposite to the upper hot-press module 322. Specifically, the connection between the lower drive cylinder 331 and the frame 31 is typically achieved through bolts, clamps, or welding to ensure the stability and precise positioning of the cylinder under the frame 31. The lower hot-press module 332 is connected to the moving end of the lower drive cylinder 331, possibly through a mechanical structure such as a slider, guide rail, or hinge, to ensure smooth movement of the module. After receiving a control signal, the lower drive cylinder 331 generates power using compressed air or hydraulic oil, pushing its moving end downwards. When the moving end of the cylinder moves, it drives the lower hot-press module 332 upwards, cooperating with the upper hot-press module 322 to achieve the hot-pressing operation on tissue paper. The lower hot pressing module 332 includes heating elements, such as heating plates or heating rods, for providing the necessary heat during the hot pressing process.
[0037] In this example, the conveying mechanism 10 is a belt conveyor structure, with two belts facing each other and spaced apart.
[0038] In this example, the lower hot pressing module 332 includes a first pressing block 3321 and a second pressing block 3322. The first pressing block 3321 is disposed on opposite sides of the conveying mechanism 10, and the second pressing block 3322 is disposed at the moving end of the drive cylinder. Both the first pressing block 3321 and the second pressing block 3322 are equipped with heating tubes. Specifically, the second pressing block 3322 is located in the middle of the two belts and can be raised and lowered by being driven by the drive cylinder. The two first pressing blocks 3321 are respectively disposed on the outer sides of the two belts. This design can ensure the effect of hot pressing while avoiding affecting the conveying of tissue paper.
[0039] In this example, the folding mechanism 20 includes a folding plate 21 and a robotic arm 22. The folding plate 21 is located on the conveying stroke of the conveying mechanism 10 and is used to pre-fold the tissue paper. The robotic arm 22 is located beside the folding plate 21 and is used to hold the folded tissue paper and pull it to the hot pressing mechanism 30. Specifically, the tissue paper is conveyed to the conveying stroke of the folding plate 21 by the conveying mechanism 10. The folding plate 21 is set at an acute angle to the conveying surface of the conveying mechanism 10, and the angle between the two surfaces of the folding plate 21 is between 0° and 180°, so that the tissue paper is folded when it passes through the folding plate 21. Then the robotic arm 22 holds the folded edge of the tissue paper and pulls it horizontally to the hot pressing mechanism 30.
[0040] In this example, a stop mechanism 40 is also included. The stop mechanism 40 is located on the side of the frame 31 away from the folding mechanism 20 and along the conveying stroke of the conveying mechanism 10. The stop mechanism 40 is used to block the conveying of tissue paper. Specifically, the connection between the stop mechanism 40 and the frame 31 may be achieved through bolts, welding, or clamps, ensuring the stability and precise positioning of the stop mechanism 40 on the frame 31. The stop mechanism 40 may include one or more movable stop components, which are connected to the frame 31 via springs, cylinders, or other driving mechanisms to achieve its blocking and releasing functions. The stop mechanism 40 is located on the side of the frame 31 away from the folding mechanism 20, which helps to create an effective blocking point along the conveying stroke of the conveying mechanism 10. When it is necessary to block the conveying of tissue paper, the stop components of the stop mechanism 40 are activated and moved to the blocking position by spring force, cylinder push, or other mechanisms. The stop components are perpendicular to or at an angle to the conveying path of the conveying mechanism 10 to ensure effective blocking of the paper's advance. When it is necessary to release the paper for continued feeding, the stop mechanism retracts, allowing the paper to pass through. The stop mechanism 40 is designed to improve the flexibility of the production process because it allows for the pause of paper feeding at specific times for quality checks, maintenance, or other operations. By precisely controlling the action of the stop mechanism 40, paper waste and production interruptions can be reduced, improving overall production efficiency. The stop mechanism 40 also serves as a safety device, preventing the continued feeding of paper during maintenance or troubleshooting, thereby protecting the safety of operators.
[0041] In this example, the stop mechanism 40 includes a stop cylinder 41, a mounting base 42, and a stop block 43. The stop cylinder 41 is mounted on the frame 31, and the mounting base 42 is mounted on either the stop cylinder 41 or the frame 31. The stop block 43 is rotatably connected to the mounting base 42, and one end of the stop block 43 is connected to the telescopic end of the stop cylinder 41. When the telescopic end of the stop cylinder 41 extends, one end of the stop block 43 rotates and extends out of the conveying surface of the conveying mechanism 10. Specifically, the connection between the stop cylinder 41 and the frame 31 is achieved by bolts, welding, or other fixing methods to ensure the stability and precise positioning of the stop cylinder 41 on the frame 31. The mounting base 42 can be a separate component or part of the frame 31, and its connection to the stop cylinder 41 or the frame 31 may be achieved by threads, slots, or other mechanical connection methods. The rotatable connection between the stop block 43 and the mounting base 42 may be achieved through bearings, hinges, or other rotating mechanisms to allow the stop block 43 to rotate flexibly when needed. The extended position of the stop block 43 is positioned on the conveying path of the conveying mechanism 10 to ensure effective blocking of the conveying of tissue paper. When the stop cylinder 41 receives a control signal, its internal piston extends or retracts according to the pressure of compressed air or hydraulic oil. When the extension end of the stop cylinder 41 extends, it pushes one end of the stop block 43 through a connecting mechanism, causing the stop block 43 to rotate around the mounting base 42 and extend out of the conveying surface of the conveying mechanism 10, thereby blocking the conveying of paper. When it is necessary to release the paper to continue conveying, the extension end of the stop cylinder 41 retracts, and the stop block 43 rotates and retracts, allowing the paper to pass. The design of the stop mechanism 40 can improve the control precision of the production process because it allows for precise blocking or release of the paper conveying at specific moments. By precisely controlling the action of the stop cylinder 41, paper waste and production interruptions can be reduced, improving overall production efficiency. The stop mechanism 40 can also serve as a safety device to prevent paper from continuing to be fed during maintenance or troubleshooting, thereby protecting the safety of operators.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hot-pressing and folding device for household paper, characterized in that: The device includes a conveying mechanism, a folding mechanism, and a hot-pressing mechanism. Household paper is conveyed by the conveying mechanism to the folding mechanism, which folds the paper in half. The conveying mechanism then conveys the folded paper to the hot-pressing mechanism. The hot-pressing mechanism includes a frame, and an upper hot-pressing assembly, a lower hot-pressing assembly, and a width adjustment assembly, all mounted on the frame. The upper and lower hot-pressing assemblies are arranged vertically opposite each other, and the conveying mechanism is located between them. The width adjustment assembly includes baffles and a limiting structure located on opposite sides of the conveying mechanism. The distance between the limiting structure and the baffles can be adjusted according to the width of the household paper.
2. The hot-pressing and folding device for household paper according to claim 1, characterized in that: The limiting structure includes a movable plate and an adjusting cylinder. The adjusting cylinder is mounted on the frame. The movable plate is connected to the movable end of the adjusting cylinder. The movable plate is opposite to and parallel to the baffle.
3. The hot-pressing and folding device for household paper according to claim 2, characterized in that: Both the movable plate and the baffle have a flexible layer on their opposite sides, and the flexible layer is connected to the movable plate and the baffle by adhesive bonding.
4. The hot-pressing and folding device for household paper according to claim 1, characterized in that: The upper hot pressing assembly includes an upper drive cylinder and an upper hot pressing module. The upper drive cylinder is mounted on the frame, and the upper hot pressing module is mounted on the moving end of the upper drive cylinder.
5. The hot-pressing and folding device for household paper according to claim 4, characterized in that: The lower hot pressing assembly includes a lower drive cylinder and a lower hot pressing module; the lower drive cylinder is mounted on the frame, the lower hot pressing module is mounted on the moving end of the lower drive cylinder, and the lower hot pressing module is positioned opposite to the upper hot pressing module.
6. The hot-pressing and folding device for household paper according to claim 5, characterized in that: The lower hot pressing module includes a first pressing block and a second pressing block. The first pressing block is disposed on opposite sides of the conveying mechanism, and the second pressing block is disposed on the moving end of the driving cylinder. Both the first pressing block and the second pressing block are provided with heating tubes.
7. The hot-pressing and folding device for household paper according to claim 1, characterized in that: The conveying mechanism is a belt conveyor structure, in which two belts are arranged opposite each other and spaced apart.
8. The hot-pressing and folding device for household paper according to claim 1, characterized in that: The folding mechanism includes a folding plate and a robotic arm; the folding plate is located on the conveying stroke of the conveying mechanism and is used to pre-fold the tissue paper; the robotic arm is located beside the folding plate and is used to clamp the folded tissue paper and pull it to the hot pressing mechanism.
9. The hot-pressing and folding device for household paper according to claim 1, characterized in that: It also includes a stop mechanism, which is located on the side of the frame away from the folding mechanism and on the conveying stroke of the conveying mechanism. The stop mechanism is used to block the conveying of tissue paper.
10. The hot-pressing and folding device for household paper according to claim 9, characterized in that: The stopping mechanism includes a stopping cylinder, a mounting base, and a stopping block; the stopping cylinder is mounted on the frame, and the mounting base is mounted on the stopping cylinder or the frame; the stopping block is rotatably connected to the mounting base, and one end of the stopping block is connected to the telescopic end of the stopping cylinder; when the telescopic end of the stopping cylinder extends, one end of the stopping block rotates and extends out of the conveying surface of the conveying mechanism.